An-Nisa' - 4:155

فَبِمَا نَقْضِهِم مِّيثَاقَهُمْ وَكُفْرِهِم بَآيَاتِ اللّهِ وَقَتْلِهِمُ الأَنْبِيَاء بِغَيْرِ حَقًّ وَقَوْلِهِمْ قُلُوبُنَا غُلْفٌ بَلْ طَبَعَ اللّهُ عَلَيْهَا بِكُفْرِهِمْ فَلاَ يُؤْمِنُونَ إِلاَّ قَلِيلاً
[4:155]
Therefore, for their breaking their covenant and their disbelief in the communications of Allah and their killing the prophets wrongfully and their saying: Our hearts are covered; nay! Allah set a seal upon them owing to their unbelief, so they shall not believe except a few.
(They have incurred divine displeasure): In that they broke their covenant; that they rejected the signs of Allah; that they slew the Messengers in defiance of right; that they said, "Our hearts are the wrappings (which preserve Allah's Word; We need no more)";- Nay, Allah hath set the seal on their hearts for their blasphemy, and little is it they believe;-
Then because of their breaking of their covenant, and their disbelieving in the revelations of Allah, and their slaying of the prophets wrongfully, and their saying: Our hearts are hardened - Nay, but Allah set a seal upon them for their disbelief, so that they believe not save a few -